Blade-fastening.



No. 875,645. PATENTED DEC. 31, 1907.

-N. G. BASSETT.

I BLADE FASTENING.

APPLIOATION FILED our. 29, 1906. RENEWED MAY 27, 1907.

V I A 6 V6 ,7 W[TNESSES.- MJNVENTOR L92M ad's B2 4 ATTORNEY.

UniTnn STATES ra n cannon NORMAN O. BASSFTT, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-CHALMERS COM PANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW JERSEY.

BLADE-FASTENING.

Specification of Letters Patent.

Patented Dec. 31, 1907.

- Application filed October 29. 1906, Serial No. 341.075. Renewed May 27; 1%7- Serial No. 375,954.

T 0 all whom it may concern:

Be it known that I, NORMAN C(Bassnrr, a citizen of the United States, residing at.

'firmly secure to a member a plurality of simi larly associated elements. p

The purpose of this invention is to provide a blade-holding member which is easily and cheaply constructed and with which the blades are adapted .to besecured within a recess provided by a blade-carrying member by filling blocks. Y

In the drawings which accompany this specification and form a part thereof and on which the same reference characters are used to designate the same elements wherever they may appear in each of the several views and which drawings illustrate embodiments of this invention,-Figure 1 represents a plan of a fragment of a blade-carrying memher with blades secured therein, the blades being shown in section. Fig. 2 represents a sectional elevation of the arrangement of the parts as shown in Fig. 1. plan similar to that shown in Fig. 1, illustrating an alternative method of locking the filling blocks to the blade-carrying member. Fig. 4 represents a sectional elevation of, the partsas shown by Fig. 3. Fig. 5 represents a plan similar to Fig. l but showing a second alternative method of locking the filling blocks to the blade-carrying member. Fig. 6 is a sectional elevation of the parts as shown by Fig. 5. Fig. 7 is aperspective view of one of the filling blocks as shown by Figs. 5 and 6 before it is calked into place. Fig. 8 is a plan similar to Fig. 1 but showing a third alternative method of locking the fill-, ing blocks to the bla'decarrying I member. Fig. 9 is a sectional elevation of the parts as shown by Fig. 8. i,

The term blades as used in this specification is used in the generic sense and is in- Fi 3 represents a tended to include any similar or equivalent elements which may be assembled in the manner shown-and is not intended to restrict this invention to any specific apparatus in and 9. This last mentioned recess, however, may beomitted in some cases, its function being to provide additional security to the assembled structure by affording a positive lock to hold the parts in'their secured relation.

The numeral 7 represents a blade-holding member which is provided with a projecting or offset portion 8 adapted to seat in the undercut portion 3 of the blade-carrying member, and the blade holding member 7 is notched, the notches being approximately triangular-in shape as seenin plan. The' blade-holding member 7 is'preferably adapted to be seated upon the bottom of the recess 2 and is provided with recesses to receive projections formed upon the blades in order to prevent the withdrawal of. the blades endwise therefrom, as clearly shown by each .of, the several figures of the drawings.

With the construction of blades as shown by the drawings, viz., .provided with enshown at (i, Fig. 2, 5 Fig. 4 and 6 in Figs. 6

larged heads at their lower ends, the bladeholding member 7 need not necessarily be provided with recesses for said heads, but its depth maybe decreased by an amount equal to the thickness of said heads, in which'case it would not seat against the bottom of the recess 2, but the construction as described above and shown by the drawings is the preferred donstruction.

The constructions which are the subj of this invention are intended to facilitate the 1 assembling of the blades with the blade holding-member 7 and the secure locking ofv 1 said blades andblade holding member with- 1n the recess/oi the blade-carrying member 1,

and is of special importance when it is de sired to remove one or more damaged blades, as it is necessary to remove, for example, only a single filling block and the damaged blade when a new blade can be inserted and secured by a filling block. The notches in the blade-holding member 7, it will be noticed, as shown by-each of the several figures of the drawings, are of ample size to rovide for the removal of an individual b ade by forcing it to the right, as shown, and giving it a slight twist-if necessary.

The numeral 9 indicates the blades and the numeral 10 indicates the filling blocks of the character shown by Figs. 1 and 2. It is preferred in the specific construct-ion shown by Figs. 1 and 2 to provide the filling blocks with a rounded top portion, as shown at 11.,

Fig. 2, which provides for the flow of the matrial and insures the lillingol' the recess 4 by said material.

The numeral 12 represents the filling blocks ol the type shown by Figs. 3 and at. These filling blocks are preferably formed at their lower part to fit accurately upon the heads of the blades and to seat against the bottom of the recess 2. A slot 13 is cut lengthwise in their upper surfaces and the parts ol the blocks outside of said slot are made 01 a height so that when the blocks are seated in place and said outer part 14 is forced outwardly, it will engage in the recess 5.

Th numeral .15 represents the filling blocks of the character shown by Figs. 5, 6, 7,

borin maerri'ne.

S and SJ. Each filling block is recessed at its lower end at l6,w\'hereby aprojection 17 is provided, this projection being adapted to seat against the bottom of the recess 2, and the material comprising it being adapted to be forced into the recess 6 when the block is forced or pounded home. The filling blocks 15 may also be recessed or maybe made short enough so that the blade carrying member may be calked over them or into said recesses, as clearly shown at 1.8 on Fig. E), which shows the parts in position and ready for the calking tool. "It will thus be seen that this invention provides a very simple and secure arrangement for securing together a plurality of parts such as described.

The importance of this invention from a structural standpoint is due to the fact that the blade-carrying member 1 is usually a massive casting upon which it is only possible practically to work 'with ,the lathe or The blades must be accurately spaced and accurately positioned.

with respect to said member, which is accomplished by providing the blade-holding member 7, which is a comparatively light member, easily handled-and readily machined to .the required accuracy of shape. By providing the blade-holding member 7 with notches of substantially the size and 'shape indicated by he drawings, the blades 5 are readily assembled with or disassembled lrom said blade-holding member 7 while said blade-holding member is seated in the recess jprovidcd by said blade-carrying member 1 each blade, by eai'h of which the blades and blade-holding member 7 are firmly secured to the blade-carrying member 1, the greatest sim'plicity and security of Fastening is realized and at the same time the greatest facility notches, and filling blocks to secure said blade-holding member and blades in the recess of said blade-carrying member, said filling blocks being locked to said bladecarrying member.

3. The combination with a blade-carrying member, provided with. arecess a side of which is undercut, of a blade-holding member, provided with notches and a projection, said projection being adapted to engage with said side in the undercut portion thereof, blades seated in said notches, and filling blocks to secure said blade-holding member and blades in the recess of said blade-carry ing member. j

4. The combination with a blade-carrying member, provided with a recess, of a bladeholding member provided with notches and recessed adjacent said notches, seated in said recess, said blade holding member being provided with a projection adapted to. engage wit h said side in the undercut portion thereof, blades seated in said notches and pro vided with projections adapted to engage with said blade holding member in the recessed portions thereof, and filling blocks to secure said blade-holding member and blades in the recess of said blade-holding member.

, 5. The combination with a blade-carrying member, provided with a recess, of a bladeholding member provided with notches and .jreccssed .adjacen'tsaid notches, seated in said recess, said blade-holding member being provided with a projection adapted to engage with said side in the undercut portion thereof, blades seated in said notches and provided with projections adapted to engage with said blade-holding member in the recessed portions thereof, and filling blocks to and by providing a single lilling block l'or seated in said recess, blades seated in said for removin a (lama ed blade and re )lacin secure said blade-holding member and blades In testimony whereof I afiix my signature in the recess of said blade-holding member, in the presence of two witnesses. the recess of said blade-carrying member being provided with a depressionandpor- NORMAN T' tions of the filling blocksbeingtfprced lnto Witnesses: said depression to lock the severalparts FRANK E. DENNETT,

against displacement; JOHN OLSEN. 

